Machine for dressing millstones



J. B. S'AGKET. DRESSING. M'ILLSTONES.

Patented Mar..25,'1862.

Inveni'ar:

JOEL B.

SACKET, OF LA\VTON,

MICHIGAN.

MACHINE FOR DRESSING MILLSTONES.

Specification of Letters Patent No. 34,780, dated March 25, 1862.

1 '0 all whom it may concern:

Be it known that I, J. B. SAcKEr, of Lawton, in the county of Van Burenand State of Michigan, have invented certain new and useful Improvementsin Machines for Dressing Millstones; and I do hereby declare thefollowing to be a full, clear, and exact description of the same,reference being had to the accompanying drawings, and to the letters ofreference marked thereon, in which Figure (1) is a plan of the top withthe lid removed, Fig. (2) is a plan of the bottom, and Fig. (3) a frontend View, representing the picks.

The nature of my invention consists in the combination and arrangementof such devices as will be hereinafter fully set forth.

To enable others skilled in the art to make and use my invention, I willnow describe its construction and operation.

(A) represents the box in which is inclosed the carriage (B).

(C) is a cylinder operated by means of crank (W).

It should be remarked that the box (A) has a slot cut in its side forthe purpose of allowing the crank cylinder to move back and forward withthe carriage.

(D) is a large cog wheel encompassing cylinder (C) as fully shown onehalf of said cog wheel should be just doublyas wide as the other half asshown in Fig.

(b I) b) are pick handleswhich are pivoted independently through blocks(P P).

(e e e) are hooks attached to the picks.

(f f) are cords which connect said hooks to springs (g g g). It will beobserved that the springs (g g g) are formed by being wound around rod(h) as represented in Fig. (2). Each one of the pick handles is providedat its outer end with a screw thread as shown in the drawings. 7

(a a) represent clamps between which the picks (a a: a) are secured bymeans of nuts (0 c) and (cl cl), thus it will be seen that the picks canall be set either in a straight line with each other, or irregularly ascircumstances require. The face of the carriage is provided with a sheetof metal, which is cut in vertical slots, thus acting as guides to thepick handles, as seen in Fig. (3).

(u 14) represent small levers or bars pivoted to the face of thecarriage on one side of each of the slots.

(b b b) are tacks or pins, thus it will be seen that any one of thepicks can be suspended from operation simply by holding the handle upand adjusting the bar or lever beneath it.

(2' 2' 2') represent pins which are secured around the periphery ofcylinder (C) in a spiral form, thus in the revolution of said cylinderthe pins 2' will successively operate upon the picks. Any arrangement ofthese pins can be made, causing the picks to operate eithersimultaneously or alternately.

(E E) represent two cylinders, each of which is provided with pulleyblocks (F F) and connected by cord (N). i

(I) is a cog wheel on cylinder (E), which is operated by the large cogwheel (D).

(G) is also a cog wheel of wider dimensions than the other.

(H H) are gear wheels arranged upon the sliding shaft (M).

(K) is a bevel gear wheel on the screw rod (0) and between the wheels (HH). The object of this arrangement will be more fully seen hereafter.

(Y Y) represent two guides located above cylinder (E).

(w a?) are uprights secured at each end of s(a1i d 1eylinder and pass upthrough the guides (r r) are two thumb screws which extend through earson uprights (w w) as fully shown in Fig. (1). The ends of the screws (71 rest against the cross piece (S) of the carriage (B), thus by means ofthis arrangement the cord (a), which connects the pulley blocks may beloosened or tightened'at pleasure.

(79) represents a rod which is attached to the sliding shaft (M) and bymeans of which the cogs H H can be alternately thrown into gear with cogwheel (K), thus the carriage may be forced gradually in or out simply byturning the crank (WV) which will give the picks a uniformity of actionover the surface of the stone.

(J J) represent two thumb screws which extend down from a cross piece inthe carriage to the piece upon which. the rod (h) is secured. There is agroove on each side of the carriage for this piece to slide up and downin. Thus it will be observed that the force of the picks may beregulated by elevating or lowering rod (72 or the piece to which it issecured. Y

(t) represents a loop for the purpose of stopping the operation ofwheels (H H) by locking them.

It should be observed that the carriage is provided at its bottom withsmall rollers for the purpose of enabling it more easily to be moved inand out.

The operation of my invention is as follows. The machine being properlyplaced, motion is given to cylinder (C) by means of crank (W). As saidcylinder revolves the pins i i) on its circumference operates the pickhandles (6 b b) as may be seen in Figs. 1 and 2. The large cog Wheel (D)imparts motion to cylinder (E) by means of cog wheel (I). Cylinder (E)receives its motion from cylinder (E) by means of a cord or band, whichpasses around the pulley blocks of both. The cog wheel (G) on cylinder(13) imparts motion to the bevel gear wheels on shaft and the said gearwheels (H H) operate the Wheel (R) 011 screw shaft Thus it will beobvious that when the bevel Wheel (H) is thrown in gear by rod (p) thecarriage (B) will be gradually forced out, which will enable the picksto traverse the surface of the stone Without the machine being moved. Assoon as the carriage is pushed out its full length the bevel wheel (H)is thrown in gear,

which immediately reverses the motion of the carriage. The object inhaving the large cog wheel (D) of an unequal width as already describedis to give the picks an intermittent motion by sliding the cylinder (G)to one side till only the extended portion of the cog wheel (D) shallcome in contact with cog (G). Thus it will be observed that the pickswill be operated upon only during a part of the revolution of cog wheel(D).

Having thus fully described my invention,

pose set forth. J. B. SAGKET.

Attest:

JOHN MCKINNEY,

N. B. MCKINNEY.

